diff --git a/include/private/vkd3d_rw_spinlock.h b/include/private/vkd3d_rw_spinlock.h
index e69de29b..1d78b676 100644
--- a/include/private/vkd3d_rw_spinlock.h
+++ b/include/private/vkd3d_rw_spinlock.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2020 Hans-Kristian Arntzen for Valve Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef __VKD3D_RW_SPINLOCK_H
+#define __VKD3D_RW_SPINLOCK_H
+
+#include "vkd3d_spinlock.h"
+
+#define VKD3D_RW_SPINLOCK_WRITE 1u
+#define VKD3D_RW_SPINLOCK_READ 2u
+#define VKD3D_RW_SPINLOCK_IDLE 0u
+
+static inline void rw_spinlock_acquire_read(spinlock_t *spinlock)
+{
+    uint32_t count = vkd3d_atomic_uint32_add(spinlock, VKD3D_RW_SPINLOCK_READ, vkd3d_memory_order_acquire);
+    while (count & VKD3D_RW_SPINLOCK_WRITE)
+    {
+#ifdef __SSE2__
+        _mm_pause();
+#endif
+        count = vkd3d_atomic_uint32_load_explicit(spinlock, vkd3d_memory_order_acquire);
+    }
+}
+
+static inline void rw_spinlock_release_read(spinlock_t *spinlock)
+{
+    vkd3d_atomic_uint32_sub(spinlock, VKD3D_RW_SPINLOCK_READ, vkd3d_memory_order_release);
+}
+
+static inline void rw_spinlock_acquire_write(spinlock_t *spinlock)
+{
+    while (vkd3d_atomic_uint32_compare_exchange(spinlock,
+            VKD3D_RW_SPINLOCK_IDLE, VKD3D_RW_SPINLOCK_WRITE,
+            vkd3d_memory_order_acquire, vkd3d_memory_order_relaxed) != VKD3D_RW_SPINLOCK_IDLE)
+    {
+#ifdef __SSE2__
+        _mm_pause();
+#endif
+    }
+}
+
+static inline void rw_spinlock_release_write(spinlock_t *spinlock)
+{
+    vkd3d_atomic_uint32_and(spinlock, ~VKD3D_RW_SPINLOCK_WRITE, vkd3d_memory_order_release);
+}
+
+#endif